System firmware compatibility problem The phone is the hardware, and the system firmware is the system software,System software is responsible for scheduling hardware operations and providing human-computer interaction with the user. We know that Apple's ios system is closed, some people like to break the restrictions of the ios system and jailbreak, you can download free crack APP application software and Apple prohibited application software.
Can only be forced to restart, Apple forced to restart the shortcut key is to press the Home button at the same time the power button has not been released, forcing the hardware system to restart until you see the screen Apple Logo screen so far. When the Apple icon appears on the screen, it indicates that the forced startup has been successful, and you are waiting to enter the desktop.
is usually caused by system instability, the solution is as follows: Method 1: restore the Settings for five consecutive times, set -- general -- cellular mobile network -- cellular mobile data network -- Restore the Settings *5 -- restart. Method 2: Shut down - Connect the charger to restart automatically - check the WiFi repair is complete. Method 3: Using iTunes to recover the firmware is to reload the firmware.
S When connecting to WiFi, the wireless LAN is unavailable. Possible cause: The router has changed the WiFi password, but the password saved in the previous connection of the mobile phone is not changed, resulting in an authentication failure. The router is abnormal, indicating DH. ProcedureThe CP function is abnormal. The mobile phone network Settings are abnormal. Solution: Ignore the network or forget the network, re-enter the WiFi password to connect. Restart the router. Try to restore the phone network Settings. Try using a static IP address.
Try to restore the network Settings, switch on and off to try. The WiFi module is broken, which is a common problem of 4s. Playing with the mobile phone for a long time makes the temperature of the mobile phone too high, and the Wi-Fi module appears derailing or virtual welding. If the display is wifi or the wireless module is gray, then it is the problem of the wireless module.
Apple 4S wireless network band only supports 4GHz, if notOn the back of the device, there is a lid, button the card to open, which is the battery and flow card slot of the machine, the card slot is generally next to or below the battery, the battery does not need to be removed, directly pick up you can see and replace the flow card, only the sim card slot is available, and the other card slot does not need to be ignored.
4, the top is the sim card slot, the bottom is sam1 and sam2. Extended data: SIM card: mobile communication user identification card, transmission of voice data, financial transactions, e-commerce and other applications. SAM Card: Secure access module SAM is the security control in smart card application systemThe core.
5, the pos machine behind the three network cable jack which POS machine to use is the need to connect the optical fiber cat phone line to the IRDA interface behind the POS machine, there is a sign can see. The communication interface circuit is usually composed of RS232 interface, PINPAD interface, IRDA interface and RS485 interface circuit.
6, there is a card slot next to the fuselage, the same gently inserted it is good, where to buy the pos machine traffic card to buy the POS level where the traffic card is sold, the communication business hall can also be purchased. In the pos machine can be togetherWhen the data card expires, you can directly find an agent or robot to renew and recharge, or you can find someone who specializes in pos machine data card to buy or renew.
1, you plug in the cable and then turn on the wireless, if you do not set the network you use is not necessarily wired. So maybe he's on the wireless, wifi playing video games or something, probably a card. Is not installed is not the official network card driver, I have encountered this beforeLike the problem, the wireless network card driver downloaded in the driver home, started to be OK after installation. Later card machine, dropped line. So I downloaded one from the official website. There you go.
2, there may be download programs in the unlimited download or upload, occupy a lot of system resources.
3, Solution 1: The sound card driver has a problem: the CPU is full load, the reason for this situation, the audio file is damaged. Generally not the problem of the speaker solution 2: Plug in the headset sound will not card: it should be the speaker there is a poor contact fault.